Air Team Role
The role of the air team is fairly simple. The pilot needs to fly over the submarine and take out the incoming enemy choppers. First, you will need to set the Avenger on auto-pilot and then mount the turret to take out the enemy choppers.
A good tip here is to fly quite high up in the sky above the submarine, this will help you to avoid getting shot at from the attack choppers. And even if they get near you, they will then take quite a bit of time to gain the altitude to be able to hit you. Until they do that, you can take them out.
Underwater Team Role
The underwater team needs to get closer to the submarine. When they do, a cut scene will appear showing them entering the submarine. Once you're inside, go through a narrow passage. It will have 3-4 soldiers so kill them and keep moving forward. At the end of the narrow passage, you will see another guard and another set of doors to pass through, once you're through the doors you will be in a room full of screens and consoles.
Here you will find two guards. Take them out and then move forward, as you're passing through the door forward, you will see another guard coming towards you, take him out as well. When you reach the end, you will come across a set of stairs leading you downstairs. Go downstairs and turn left and you should come across a locker room. Passing through the locker room, you will be inside a kitchen where you will see two guards, take them out and continue forward.
Continue forward and you will come across another set of stairs leading you further downstairs. Now, here's the thing when you reach downstairs: you can either turn left or right. The only difference is turning left is completely useless and you will be wasting time killing more enemies for no reason. If you want to be amused you can turn left and keep going until you've cleared all the enemies.
However, if you want to save time, then simply turn right after going downstairs and go through a set of doors to reach the Russian prisoner (contact). There will be one guard there as well. Take him out and then interrogate the prisoner for information. Aim at the prisoner (do not shoot) and he should give you the information.
After getting the information, you need to head back up stairs to the room with a bunch of screens and consoles. Once you reach the room, you need to bring up your phone and take the picture of the table. After that plug the USB in to one of the consoles and a cut scene should start.
After the cut scene ends, you will automatically find yourself outside the submarine. Quickly swim to the shore and ask your friend in the Avenger to land at the shore. Re-group in the Avenger and head to Los Santos International Airport. You can use the turret in the Avenger to take out some of the choppers as your friend is flying away. After flying a bit further, they will stop coming at you. Land your Avenger inside Devin Weston's hangar to successfully complete this heist.
Congratulations on completing The Bogdan Problem! You've successfully finished Act 2 of the Doomsday Heist. Don't forget to check out our guide for Act 3 of the Doomsday Heist and our main Bogdan Problem Hub for any missed details or the FAQ.
